WO2012029848A1

WO2012029848A1 - Absorbent article

Info

Publication number: WO2012029848A1
Application number: PCT/JP2011/069762
Authority: WO
Inventors: 涼子栗原
Original assignee: 大王製紙株式会社
Priority date: 2010-08-31
Filing date: 2011-08-31
Publication date: 2012-03-08
Also published as: JP2012071102A; JP5827036B2

Abstract

[Problem] To improve adhesion to the perineum and to prevent rear leakage. [Solution] On a non-skin contacting surface of an absorber (4), a Y-shaped groove (23) is formed, which comprises a left-and-right pair of front grooves (24, 24) formed from an intersection point (C) in the center part of the width direction behind a blood discharge opening (H) towards either side in the diagonally forward direction, and a rear groove (25) formed from the intersection point (C) towards the rear along the longitudinal direction of a sanitary towel (1). A raised portion is formed in the shape of a triangular pyramid with the intersection point (C) as the peak and with the Y-shaped groove (23) as a flexible shaft thereof, wherein in the raised portion, the lines of the front grooves (24, 24) extending towards either side in the diagonally forward direction fit triangular body lines (La, La) that run from the rear of the blood discharge opening (H) to the start of the cleavage of the buttocks, and the line of the rear groove (25) extending towards the rear fits a body line (Lb) that extends from the start of the cleavage of the buttocks towards the rear.

Description

Absorbent articles

The present invention relates to absorbent articles such as sanitary napkins, panty liners and incontinence pads for absorbing menstrual blood, vaginal discharge, etc., and has improved adhesion to the perineum and prevents back leakage About.

Conventionally, as absorbent articles such as panty liners, sanitary napkins, cage sheets, incontinence pads, toiletries, etc., liquid-impervious back sheets such as polyethylene sheets or polyethylene sheet-laminated nonwoven fabrics, nonwoven fabrics or liquid-permeable plastic sheets, etc. There is known one in which an absorbent body made of cotton-like pulp or the like is interposed between the liquid-permeable surface sheet.

Many improvements have been made to this type of absorbent article, and various means for preventing body fluid leakage have been taken. In particular, as one of the causes of after-leakage such as a night napkin, there is a transmission leak due to a gap formed between the napkin and the perineum.

For this reason, conventionally designed to fit the shape of the blood outlet and the body behind it has been developed. For example, Patent Document 1 below includes a raised portion extending in the longitudinal direction of an absorbent article raised to the skin contact surface side at the center of the absorbent portion, and the absorbent portion has a thickness of a portion where the raised portion is formed. Is thicker than the thickness of the portion where the raised portion is not formed, and has a groove extending in the longitudinal direction of the absorbent article on the non-skin contact surface side of the raised portion corresponding to the raised portion, An absorbent article is disclosed in which a plurality of the grooves are provided in the absorbent portion. Moreover, in the following Patent Document 2, a bulge portion that protrudes toward the skin contact surface side is provided at the rear portion of the absorption portion, and an absorbent article is provided on the non-skin contact surface side of the absorption portion corresponding to the bulge portion. An absorbent article having a rear groove extending in the longitudinal direction of the absorbent article at the center in the width direction is disclosed.

Japanese Patent No. 3850102 Japanese Patent No. 3850103

In the absorbent article described in Patent Document 1, when a force in the width direction is applied to the central portion from the side, the groove is bent in the groove and the raised portion has a cross-sectional arch shape that is convex toward the skin contact surface side. In this way, the wearer's crotch is in good contact.

On the other hand, in the absorbent article described in Patent Document 2, by making the rear groove function as a flexible shaft, the rear portion of the absorbent portion is deformed into an inverted V shape when the sanitary napkin is worn, and the wearer's It is intended to fit well to the buttocks.

However, even if it can be brought into contact with the blood drainage port of the wearer by providing a raised portion in the central portion of the absorbent article, A gap is likely to be formed between the perineum and the absorbent article, and leakage backward may occur through this gap.

Moreover, although the rearward groove functioning as a flexible shaft improves the deformation performance in the cross-sectional direction, the rearward groove is formed as a linear concave groove compressed at high density. Therefore, the deformation performance in the longitudinal direction of the absorbent article, i.e., the deformation performance with the transverse direction as the axis, decreases on the contrary, making it difficult to deform the napkin rear portion along the roundness of the buttock, There was a gap between them, and menstrual blood or the like that leaked backward through the gap in the perineum could not be captured, leading to a risk of back leakage.

Therefore, the main problem of the present invention is to provide an absorbent article that improves adhesion to the perineum and prevents back leakage.

In order to solve the above problems, as the present invention according to claim 1, in an absorbent article in which an absorbent body is interposed between a liquid-permeable top sheet and a liquid-impervious back sheet,
A pair of left and right front grooves formed on the non-skin contact surface side of the absorbent body from the intersection of the center in the width direction behind the blood drainage port toward both sides diagonally forward, and the absorbent article from the intersection There is provided an absorbent article characterized in that a Y-shaped groove comprising a rear groove formed toward the rear along the longitudinal direction of is formed.

In the first aspect of the present invention, a pair of left and right front grooves formed on the non-skin contact surface side of the absorbent body from the intersection of the central portion in the width direction behind the blood drainage port toward both sides diagonally forward; , By forming a Y-shaped groove composed of a rear groove formed from the intersection point toward the rear along the longitudinal direction of the absorbent article, the Y-shaped groove is made thinner than other portions, Since rigidity (secondary moment of cross section) decreases, when a leg pressure is applied from both sides, a triangular pyramid-shaped ridge is formed with the Y-shaped groove as a flexible axis and the intersection as a vertex. . And among the triangular pyramidal ridges, the line extending on both sides diagonally forward by the front groove fits a triangular body line from the rear part of the blood drainage port to the beginning part of the valley of the buttocks, A line extending rearward by the rear groove fits rearward from the beginning of the trough valley. For this reason, this triangular pyramid-shaped bulge fits very well to the shape from the perineum behind the blood drainage port to the valley of the buttocks, and can prevent leakage of menstrual blood and the like to the rear.

As the present invention according to claim 2, the crotch portion including at least the blood drainage port portion in the widthwise central portion of the absorbent article extends in the longitudinal direction of the absorbent article and protrudes toward the skin contact surface side. 2. The absorbent article according to claim 1, wherein the absorbent article according to claim 1 has an absorbent middle high portion, and the Y-shaped groove is formed on the non-skin contact surface side of the absorbent body corresponding to the absorbent middle high portion and the vicinity thereof. The

In the invention according to the second aspect, the absorbent body extends in the longitudinal direction of the absorbent article and protrudes toward the skin contact surface side at the crotch portion including at least the blood drainage opening portion at the center in the width direction of the absorbent article. Absorber middle-high part which has a middle-high part and is raised on the skin contact surface side by forming the Y-shaped groove on the skin contact surface side of the absorbent body corresponding to the absorber middle-high part and the vicinity thereof Can be better fitted around the perineum, and after-leakage can be reliably prevented.

As a third aspect of the present invention, a pair of left and right crotch embossments are formed on both sides of the Y-shaped groove on the skin contact surface side of the absorbent body along the substantially longitudinal direction of the absorbent article. In addition, the rear end portion of the crotch embossing is substantially parallel to a virtual line connecting the front end of the front groove and the rear end of the rear groove in a range having an overlap margin in the width direction with the Y-shaped groove. An absorbent article according to any one of

claims

1 and 2 is provided.

In the invention described in claim 3, a pair of left and right crotch embossments are formed on both sides of the Y-shaped groove on the skin contact surface side of the absorbent body along the substantially longitudinal direction of the absorbent article, and the crotch The rear end of the part embossing is formed so as to be substantially parallel to a virtual line connecting the front end of the front groove and the rear end of the rear groove in a range having an overlap margin in the width direction with the Y-shaped groove. Therefore, by the rear end of the crotch embossing, the direction of action of leg pressure from both sides can be converted to a direction perpendicular to the imaginary line connecting the front end of the front groove and the rear end of the rear groove, The region surrounded by the front groove and the rear groove of the Y-shaped groove can be easily raised by the leg pressure.

The present invention according to claim 4 is the absorbent article according to claim 3, wherein a pair of left and right intermediate embosses having a margin of overlap in the direction orthogonal to the imaginary line is formed behind the crotch embossing. Is provided.

In the invention of claim 4 above, by forming a pair of left and right intermediate embosses having an overlap allowance in the direction orthogonal to the imaginary line behind the crotch embossing, the overlap in the direction orthogonal to the imaginary line is performed. Since the rigidity of the absorbent body of the double embossed portion having a margin increases, it becomes easy to convert the leg pressure from both sides into a force for raising the region surrounded by the front groove and the rear groove of the Y-shaped groove. .

As an aspect of the present invention according to claim 5, there is provided the absorbent article according to any one of claims 1 to 4, wherein an angle formed by the front grooves of the Y-shaped groove is 70 ° or more and less than 180 °.

In the fifth aspect of the invention, since the body line formed in the perineum is often approximately 70 ° or more starting from the beginning of the buttocks, the angle between the front grooves is 70 ° or more, 180 ° Less than °.

As the present invention according to claim 6, intermittent concave grooves are formed along the longitudinal direction of the absorbent article on the non-skin contact surface side of the absorbent body behind the Y-shaped grooves, and the periphery thereof. A plurality of horizontally long peripheral embosses are formed in the absorbent body positioned at a distance in the longitudinal direction of the absorbent article, and an absorbent defect portion is formed between the concave grooves. The absorbent article described is provided.

In the invention of claim 6, an intermittent concave groove is formed along the longitudinal direction of the absorbent article on the non-skin contact surface side of the absorbent body behind the Y-shaped groove, and is positioned in the vicinity thereof. Forming a plurality of laterally long peripheral embosses at intervals in the longitudinal direction of the absorbent article on the absorbent body, and forming an absorber defect portion in which the absorber is lost between the concave grooves. The shaft part along the forming row is thinner than the other parts, and the rigidity (secondary moment of the cross section) is reduced. Deformation performance that rises along the valley of the buttock in the article transverse direction (absorbent article width direction) can be ensured. Further, the absorbent body around the concave groove is given stiffness against bending in the cross-sectional direction of the absorbent article, and a rigidity difference is given between the absorbent body in the vicinity of the concave groove and the peripheral absorbent body, and only the central portion Deformation performance is ensured that deforms along the valley of the buttocks. Further, by forming an absorber defect portion between the concave grooves, when the raised portion along the trough of the buttock is curved along the roundness in the front-rear direction of the buttock, Deformation in the compression direction and tension direction is absorbed, and wrinkles in the width direction are less likely to occur on the skin contact surface side, and it is possible to satisfactorily adhere to the back of the narrow valley of the buttock. Accordingly, the central portion in the rear width direction is easily raised along the longitudinal direction, and the raised portion is easily curved along the roundness in the front-rear direction of the buttock, thereby improving the adhesion to the valley of the buttock, After-leakage can be prevented.

As described above in detail, according to the present invention, it is possible to provide an absorbent article that improves adhesion to the perineum and prevents back leakage.

It is an expanded view of the sanitary napkin 1 which concerns on this invention. It is the II-II arrow directional view. FIG. 3 is a view taken along the line III-III in FIG. 1. It is a bottom view of a human body which shows a crotch part structure. FIG. 6 is a plan view of the absorber defect portion 22. It is the top view and sectional drawing of the absorber defect | deletion part 22 which concern on another form.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Basic structure of sanitary napkin 1]
As shown in FIGS. 1 to 3, the sanitary napkin 1 according to the present invention has a liquid-impervious back sheet 2 made of a polyethylene sheet or the like, and a liquid-permeable top that allows quick passage of menstrual blood, cages, and the like. Sheet 3,

absorbent bodies

4, 6 made of cotton-like pulp or synthetic pulp interposed between both

sheets

2, 3, and the absorbent body 4 for maintaining the shape and improving the diffusibility of the absorbent body 4. The left and right sides are provided so as to protrude from the front surface side in a predetermined section in the front-rear direction so as to include at least the body fluid discharge portion with the substantially side edge portion of the absorbent body 4 as an upright base end. It is mainly composed of a pair of three-dimensional gathers BS, BS, and around the absorbent body 4, the outer edge portions of the liquid-impervious backsheet 2 and the liquid-permeable topsheet 3 are formed at the upper and lower end edges. Adhesion such as hot melt And the non-woven impermeable back sheet 2 that is joined by an adhesive means such as heat seal or the like and extends laterally from the absorbent body 4 at both side edges thereof, and the side nonwoven fabric forming the three-dimensional gather BS 7 are bonded by an adhesive such as hot melt or an adhesive means such as heat seal, and wing-shaped flaps W and W projecting laterally by a laminated sheet portion of the liquid-impermeable back sheet 2 and the side nonwoven fabric 7 are provided. together they are formed, which second wing-shaped flaps portion located buttocks side from W _B, is W _B are formed.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impervious backsheet 2, a sheet material having at least water shielding properties such as polyethylene is used, but in recent years, a material having moisture permeability tends to be used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used. One or a plurality of adhesive layers (not shown) are formed on the non-use side (outer surface) of the liquid-impermeable back sheet 2 so as to fix the sanitary napkin 1 to the underwear when worn on the body. It has become. As the liquid-impermeable back sheet 2, a polylaminated nonwoven fabric in which a plastic film and a nonwoven fabric are laminated may be used.

Next, the liquid-permeable top sheet 3 is preferably a porous or non-porous nonwoven fabric or a porous plastic sheet. As the material fibers constituting the nonwoven fabric, in addition to olefins such as polyethylene or polypropylene, polyesters, polyamides, and other synthetic fibers, regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used. A nonwoven fabric obtained by an appropriate processing method such as a method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable top sheet 3, menstrual blood, venom, etc. (hereinafter collectively referred to as body fluid) are quickly absorbed, and the dry touch property is excellent. It will be a thing.

The absorbent body 4 is not particularly limited as long as it can absorb and retain body fluids. Usually, a fluffy pulp mixed with water-absorbing polymer powder is preferably used from the viewpoint of absorption function and price. The absorbent body 4 is preferably surrounded by an encapsulating sheet 5 in order to maintain the shape. As the encapsulating sheet 5, crepe paper, hydrophilic nonwoven fabric, or the like can be used.

Synthetic fibers may be mixed in the absorber 4 and / or the absorber middle-high portion 6 described later. As the synthetic fiber, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. It may be a mixture. In addition, a composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can also be used. In the case of a hydrophobic fiber, it is desirable to use a synthetic fiber that has been surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.

On the use surface side of the absorber 4, an absorber middle-high portion 6 that is elongated in the longitudinal direction of the napkin at the center in the width direction and extends in the longitudinal direction and protrudes toward the skin contact surface side can be formed. The absorber mid-high portion 6 includes a crotch portion 6A including a blood drainage port portion H of the wearer and a portion corresponding to a Y-shaped groove 23 described later at the center in the width direction, and a rear end of the crotch portion 6A. To the rear rear part 6B. The crotch portion 6A among the middle height portion 6 of the absorber is preferably provided at a predetermined height in order to maintain the amount of absorption and adhesion to the blood drainage port, but the rear portion 6B is deformed by embossing described later. It is preferable to make it thinner or eliminated from the crotch portion 6A so as not to hinder it. The thickness of the absorber middle high portion 6 is 3 to 20 mm, preferably 5 to 15 mm at the crotch portion 6A, and 0 to 10 mm, preferably 0 to 3 mm at the rear portion 6B. In addition, as shown in FIG. 3, the skin contact surface side of the rear portion 6B is bulky so that the wearer does not feel uneasy by thinning or eliminating the absorber middle high portion 6 of the rear portion 6B. A second sheet 6a can be provided. The second seat 6a is preferably made of a material having a high cushioning property so as not to affect the deformation of the

absorbent bodies

4 and 6. In addition, the absorber middle-high portion 6 is formed such that the rear portion 6B is narrower than the front portion 6A, and the width and / or thickness gradually decreases toward the rear at the boundary between the front portion 6A and the rear portion 6B. Is formed. The boundary range in which the width and / or thickness is gradually reduced is such that the front start position is slightly behind the portion corresponding to the intersection C of the Y-shaped groove 23 described in detail later, and the rear end position is the rear stage. It is preferable that the rear side of the rear groove 25 of the Y-shaped groove 23, which will be described in detail, be slightly rearward from the portion corresponding to the rear end. Thereby, the fitting property of the boundary portion between the crotch portion 6A and the rear portion 6B is improved.

On the other hand, the width dimension of the liquid-permeable top sheet 3 is slightly longer than the width of the absorbent body 4 as shown in the cross-sectional views of FIGS. The three-dimensional gather BS prevents the permeation of menstrual blood, or the like, or enhances the feeling of touch, etc. Depending on the purpose, a nonwoven fabric material subjected to appropriate water repellent treatment or hydrophilic treatment is used. The side nonwoven fabric 7 can be made of natural fiber, synthetic fiber, regenerated fiber, or the like and formed by an appropriate processing method. Preferably, the side nonwoven fabric 7 eliminates the feeling of stickiness and prevents stuffiness. For this reason, it is preferable to use a non-woven fabric with reduced basis weight and air permeability. Specifically, it is desirable to use a nonwoven fabric prepared with a basis weight of 13 to 23 g / m ² , and silicon-based, paraffin-based, alkylchromic chloride-based water repellents and the like to reliably prevent permeation of body fluids. A water repellent nonwoven fabric coated with is preferably used.

As shown in FIGS. 2 and 3, the side nonwoven fabric 7 has an outer portion from the intermediate portion in the width direction from the inner position of the absorbent body 4 to slightly beyond the absorbent side edge to the outer edge of the liquid-impermeable backsheet 2. A pair of left and right wings are bonded to the absorbent body side portion substantially corresponding to the body fluid discharge portion by the laminated sheet portion of the side nonwoven fabric 7 and the liquid-impervious back sheet 2. flaps W, to form a W, a second wing-shaped flaps W _B now to the buttocks side _position, to form a W _B. These wing-shaped flaps W, W and second wing-shaped flaps W _B, W, respectively on the outer surface side pressure-sensitive adhesive layer of _B 8 ..., 9 ... with a when worn against shorts, line folding the wing-shaped flaps W, W It is folded back to the opposite side at the RL position and wrapped around the crotch portion of the shorts to be fastened.

On the other hand, while the inner side part of the said side nonwoven fabric 7 is folded back substantially double, the thread-like elastic elastic member by which the appropriate position of the both ends or the longitudinal direction was fixed to the height direction intermediate part inside this double sheet | seat Are provided, and three-dimensional gathers BS and BS standing on the surface side are formed. Specifically, as shown in FIG. 2 and FIG. 3, in the standing state, the side surface standing portion 7 a that stands up from the side edge portion of the absorber 4 or the vicinity thereof, and the tip of the side surface standing portion 7 a are continuously provided. A skin contact surface portion 7b having a predetermined width that is formed to be substantially horizontal or inclined to the center side with respect to the surface of the napkin 1, and the side surface standing portion 7a of the skin contact surface portion 7b It is located outside the outer side edge. Each of the side upright portion 7a and the skin contact surface portion 7b has one or a plurality of thread-like elastic elastic members 10... 11 in the illustrated example along the longitudinal direction of the sanitary napkin 1. It is arranged.

[Embossed structure]
Next, an embossed structure formed on the non-skin contact surface side and an absorbent body defect portion in which the absorbent body is lost and an embossed structure formed on the skin contact surface side will be described below.

<< Embossed and Absorbent Defects Formed on Non-Skin Contact Surface >>
In the sanitary napkin 1, as shown in FIGS. 1 to 3, intermittent

concave grooves

20, 20 along the longitudinal direction of the sanitary napkin 1 are formed on the non-skin contact surface side of the absorbent body 4. ... is formed. That is, the sanitary napkin 1 does not continuously form concave grooves, but intermittent concave grooves 20 in which relatively short linear concave embosses and unembossed non-processed portions are alternately arranged. , 20 ensures the deformation performance in the transverse direction with the longitudinal axis of the napkin along the

concave grooves

20, 20 as the flexible axis. In addition, although the said recessed groove | channel 20 is formed in two places before and behind in the example of illustration, it can also form three or more places.

Further, a plurality of horizontally long

peripheral embossments

21, 21... Are formed on the non-skin contact surface side of the absorbent body 4 positioned around the

concave grooves

20, 20, with a space in the longitudinal direction of the sanitary napkin 1. Yes. By forming the peripheral embossing 21, stiffness against bending in the napkin cross-sectional direction (napkin width direction) is imparted to the absorbent body 4 excluding the periphery of the concave groove 20, that is, the central portion in the width direction of the rear portion of the sanitary napkin 1. A difference in rigidity in the cross-sectional direction of the napkin occurs between the absorbent body 4 in the vicinity of the concave groove 20 and the peripheral absorbent body 4, and only the absorbent body 4 in the central part in the width direction is deformed along the valley of the buttock. Will be able to.

Furthermore, in the sanitary napkin 1, an absorber deficient portion 22 in which the absorber 4 is deficient is formed at least between the

concave grooves

20, 20, that is, in an unprocessed portion of the concave groove 20. In the illustrated example, in addition to between the

concave grooves

20, 20, it is also provided between the Y-shaped groove 23 and the concave groove 20 described in detail later. As described above, when the central portion in the width direction is raised with the formation row of the

concave grooves

20 and 20 as a flexible shaft, and the raised portion is curved along the roundness in the front-rear direction of the collar portion, the absorber Deformation part 22 absorbs the deformation of absorbent body 4 in the compression direction and tension direction, and it becomes difficult for wrinkles in the width direction to occur on the skin contact surface side, so that it can be satisfactorily adhered to the back of the narrow valley of the heel part. .

As explained above, due to the concave groove 20 formed on the non-skin contact surface side of the absorbent body 4, the peripheral emboss 21 and the absorbent body defect portion 22, the widthwise central portion of the rear portion of the sanitary napkin 1 is the napkin longitudinal length. Since it becomes easy to rise along the direction, and this raised portion is easy to bend along the roundness in the front-rear direction of the buttock, the adhesion to the valley of the buttock improves, and the back leakage of body fluid can be prevented.

On the other hand, on the non-skin contact surface side of the absorbent body 4, a pair of left and right

front grooves

24, 24 formed from the intersection C in the center in the width direction behind the blood discharge port H toward both sides obliquely forward. And the Y-shaped groove | channel 23 which consists of the back groove | channel 25 formed toward the back along the longitudinal direction of the sanitary napkin 1 from the said intersection C is formed. By forming the Y-shaped groove 23, the Y-shaped groove 23 is made thinner than the other portions and the rigidity (second moment of section) is reduced, so that the pressure of the legs from both sides acts. Occasionally, a triangular pyramid-shaped raised portion having the intersection C as a vertex is formed with the Y-shaped groove 23 as a flexible axis. Among the triangular pyramid-shaped ridges, the lines extending diagonally forward on both sides of the

front grooves

24, 24 extend from the rear part of the blood drainage port H to the beginning part of the valley of the buttocks, as shown in FIG. It fits to the body lines La and La extending toward both front sides starting from the beginning of the valley of the buttocks formed in the perineum. Further, among the triangular pyramidal ridges, a line extending rearward by the rear groove 25 fits a line Lb between the beginning of the ridge valley to the rear ridge valley. For this reason, the triangular pyramid-shaped ridge formed by the Y-shaped groove 23 fits very well to the shape of the body from the perineum behind the blood drainage port H to the valley of the buttocks, and to the back of the body fluid It is possible to prevent transmission leakage.

The structure of the embossing and the like will be described in more detail. As shown in the example of the drawing, an absorbent middle height portion 6 that extends in the longitudinal direction of the napkin and protrudes toward the skin contact surface is formed at least at the rear center portion of the sanitary napkin 1. In this case, the concave groove 20 is formed on the non-skin contact surface side of the absorber 4 corresponding to the absorber middle high portion 6, and the peripheral emboss 21 is located around the absorber middle high portion 6. A plurality of absorbers 22 are formed in the absorber 4, and the absorber deficient portion 22 is formed between at least the

concave grooves

20 and 20 of the absorber 4 corresponding to the absorber middle-high portion 6. Further, the Y-shaped groove 23 is formed on the non-skin contact surface side of the absorbent body 4 corresponding to the absorbent middle high portion 6 and the vicinity thereof.

It is desirable that the depth of the concave groove 20 is 30 to 95%, preferably 50 to 90% of the thickness of the absorber 4. When the depth of the concave groove 20 is less than 30%, it is not possible to ensure the deformation performance in the longitudinal direction as well as the deformation performance in the transverse direction. When the depth of the recessed groove 20 exceeds 95%, the rigidity of the recessed groove 20 becomes too high, and it becomes difficult to bend along the front-rear direction of the collar portion.

The length of the concave groove 20 is preferably 5 mm to 30 mm, more preferably 10 mm to 20 mm. The length of the concave groove 20 may not be constant. In the illustrated example, the concave groove 20 on the rear side is formed longer than the front side.

The concave groove 20 is desirably provided at the stage of the absorber 4 alone or the absorber 4 surrounded by the encapsulating sheet 5.

In the illustrated example, the peripheral emboss 21 is outside the pair of left and right rear embosses 31 and 31 described in detail later in a region corresponding to the buttocks of the wearer and outside the rear end design emboss 36 described in detail later. It is given to. In the peripheral emboss 21, the horizontally long embossed grooves are arranged in a zigzag shape in plan view with a space in the longitudinal direction of the sanitary napkin 1 and a space in the width direction.

The depth of the peripheral emboss 21 is desirably 20 to 95%, preferably 30 to 90% of the thickness of the absorber 4. As a result, a difference in rigidity is given to the deformation in the width direction between the central portion and the peripheral portion, so that the central portion can be reliably deformed. The length of the peripheral emboss 21 is 5 mm to 20 mm, preferably 10 mm to 15 mm.

The absorbent missing portion 22 is formed within a range of 10 mm to 20 mm in the width direction of the

sanitary napkin

1 and 5 mm to 15 mm in the longitudinal direction. As shown in FIG. (B) Absorber is lost in any shape such as a rhombus shape, (C), (D) a wedge shape, or a triangular shape. Moreover, although the cross-sectional shape is good also as the same shape in the thickness direction of an absorber, it is good also as a three-dimensional shape which changed the shape in the thickness direction of the absorber 4, as FIG. 6 shows.

The angle α formed by the

front grooves

24, 24 of the Y-shaped groove 23 is such that the angle of the body lines La, La formed in the perineum of an adult woman is high at approximately 70 ° or more. In order to adapt to the line, it is preferably 70 ° or more and less than 180 °, more preferably 90 ° or more and less than 150 °. By setting it to 70 ° or more, when the leg pressure from both sides is applied, the rising effect of the absorbent body having the Y-shaped groove 23 as a flexible shaft is improved.

It is desirable that the depth of the Y-shaped groove 23 is 30 to 95%, preferably 50 to 90% of the thickness of the absorber 4 like the concave groove 20.

The intersection C of the Y-shaped groove 23 is at least the widthwise central portion of the sanitary napkin 1 and the blood drainage mouth portion in order to improve the fit to the perineum from the vaginal opening to the vicinity of the anus on the rear side. It is set between 40 mm and 60 mm behind the sanitary napkin 1 from the center of H.

The front groove 24 and the rear groove 25 are each formed with a length of 20 mm to 40 mm from the intersection C, and the front groove 24 and the rear groove 25 are preferably equal in length, but are formed with different lengths. You can also

Further, on the non-skin contact surface side of the absorbent body 4 at the front side of the Y-shaped groove 23 and corresponding to the blood drainage port H in the widthwise central portion of the sanitary napkin 1, It is preferable to form the linear embossing 26 along the longitudinal direction. By forming the linear embossing 26, the central portion in the width direction of the absorbent body 4 rises along the longitudinal direction with the linear embossing 26 as a flexible shaft, and the sanitary napkin 1 The surface can be reliably brought into close contact with the blood drainage port of the wearer.

The front end portion of the sanitary napkin 1 is formed with a plurality of horizontally long front end

peripheral embossments

27, 27... Spaced apart in the longitudinal direction of the sanitary napkin 1. This is for improving the stiffness of the front end portion in the napkin width direction and preventing the front end portion from wrinkling.

《Emboss formed on the skin contact surface side》
In the sanitary napkin 1, as shown in FIG. 1, a pair of left and right along the substantially longitudinal direction of the sanitary napkin 1 in the region corresponding to the crotch portion of the wearer on the skin contact surface side of the absorbent body 4.

Crotch embossing

30 and 30 are formed, a pair of left and right

rear embossments

31 and 31 are formed in a region corresponding to the buttocks of the wearer, and an intermediate region between the crotch embossing 30 and the rear embossing 31 Further, a pair of left and right intermediate embosses 32 are formed so as to be spaced apart from the

embosses

30 and 31.

Further, in the front side of the crotch embossing 30 (when the absorbent middle high part 6 is provided as in the illustrated example, on the front side of the front end of the absorbent middle high part 6), the central part in the width direction of the sanitary napkin 1 is provided. A substantially umbrella-shaped front-end umbrella-like emboss 33 is formed on the top, and a front-end design emboss 34 is further formed so as to surround the front region. On the other hand, the sanitary napkin 1 in the width direction is provided at the rear part of the rear emboss 31 (in the case where the absorber middle high part 6 is provided as shown in the drawing, the rear side from the rear end of the absorber middle high part 6). A substantially umbrella-shaped rear-end umbrella-like emboss 35 is formed at the center, and a rear-end design emboss 36 is formed on the further rear side.

The crotch emboss 30 includes a blood drainage port H, and is formed in a pair of left and right along the substantially longitudinal direction of the sanitary napkin 1 in a range where the rear end is applied to the beginning of the valley of the buttocks. The front end portion is bent so as to be slightly enlarged on both sides, and the inclination angle is formed at an angle substantially parallel to the rear end portion of the front end design emboss 34.

Further, the rear end portion of the crotch portion emboss 30 has a shape inclined to the center portion in the width direction in a range having an overlap margin with the Y-shaped groove 23 in the width direction, and the inclination angle thereof is the Y-shape. A predetermined inclination angle is set in relation to the groove 23. Specifically, an imaginary line S1 obtained by extending the inclined rear end portion of the crotch emboss 30 and a virtual line S2 connecting the front end of the front groove 24 and the rear end of the rear groove 25 of the Y-shaped groove 23 are provided. It is formed so as to be substantially parallel. “Substantially parallel” means not only the case where the inclination angles of the virtual lines S1 and S2 with respect to the longitudinal line of the napkin completely coincide with each other, but also the case where the inclination angle is formed within an angular difference of ± 5 °. Including.

By setting the rear end portion of the crotch portion emboss 30 to the above-described inclination angle, the rear end portion of the crotch portion emboss 30 allows the action direction of the leg pressure from both sides to change the front end of the front groove 24 and the rear end of the rear groove 25. Can be converted in a direction perpendicular to the virtual line S2 connecting the two, and the region surrounded by the front groove 24 and the rear groove 25 of the Y-shaped groove 23 can be easily raised by leg pressure from both sides. .

The rear embossing 31 is formed in a pair corresponding to the left and right along the substantially longitudinal direction of the sanitary napkin 1 in a range corresponding to the valley of the buttocks, and the center in the width direction of the absorber at the rear is along the valley of the buttocks. It is intended to be raised exactly. The rear part emboss 31 is formed by a curve in which the substantially front half bulges outward, and the remaining rear side bulges inward. Further, the rear end portion is formed in a shape bent in a semicircular arc shape toward the outside.

In the rear part emboss 31, fit embosses 31 a, 31 a... Extending from the rear part emboss 31 to the center side in the napkin width direction are formed at positions corresponding to the absorber defect part 22. Thereby, it becomes possible to bend along the roundness in the front-rear direction of the buttocks at the formation position of the absorber defect portion 22 with the fit emboss 31a as a base point.

The intermediate emboss 32 is formed so that a part of the rear end portion and the front end of the crotch portion emboss 30 has an overlap margin with respect to a direction orthogonal to the virtual line S2. This increases the rigidity (elasticity) of the double-embossed portion of the crotch emboss 30 and the intermediate emboss 32 having an overlap margin in the direction orthogonal to the imaginary line S2, so that the leg pressure from both sides is reduced. It becomes easy to convert into the force which raises the area | region enclosed by the front groove | channel 24 and the back groove | channel 25 of the character-shaped groove | channel 23. FIG.

DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Liquid-impermeable back sheet, 3 ... Liquid-permeable top sheet, 4 ... Absorber, 5 ... Encapsulating sheet, 6 ... Absorber middle high part, 7 ... Side nonwoven fabric, 20 ... Concave groove 21 ... Peripheral embossing, 22 ... Absorber missing part, 23 ... Y-shaped groove, 24 ... Front groove, 25 ... Rear groove, 26 ... Linear embossing, 27 ... Front end peripheral embossing, 30 ... Crotch embossing, 31 ... Back embossing, 32 ... Intermediate embossing, C ... Intersection

Claims

In the absorbent article in which the absorbent body is interposed between the liquid-permeable surface sheet and the liquid-impermeable back sheet,
A pair of left and right front grooves formed on the non-skin contact surface side of the absorbent body from the intersection of the center in the width direction behind the blood drainage port toward both sides diagonally forward, and the absorbent article from the intersection An absorptive article characterized in that a Y-shaped groove comprising a rear groove formed toward the rear along the longitudinal direction is formed.
In the crotch portion including at least the blood drainage port portion in the widthwise central portion of the absorbent article, the absorbent article has an absorbent middle height portion extending in the longitudinal direction of the absorbent article and raised on the skin contact surface side, The absorbent article according to claim 1, wherein the Y-shaped groove is formed on the non-skin contact surface side of the absorbent body corresponding to the middle and high portions of the absorbent body.
A pair of left and right crotch embosses are formed on both sides of the Y-shaped groove on the skin contact surface side of the absorbent body along the substantially longitudinal direction of the absorbent article, and the rear end of the crotch embossing The portion is formed so as to be substantially parallel to a virtual line connecting a front end of the front groove and a rear end of the rear groove in a range having an overlap margin in the width direction with the Y-shaped groove. The absorbent article in any one.
The absorbent article according to claim 3, wherein a pair of left and right intermediate embosses having a partly overlapping margin in a direction orthogonal to the imaginary line is formed behind the crotch embossing.
The absorbent article according to any one of claims 1 to 4, wherein an angle formed by the front grooves of the Y-shaped groove is 70 ° or more and less than 180 °.
An intermittent concave groove is formed along the longitudinal direction at the center in the width direction of the absorbent article on the non-skin contact surface side of the absorbent body behind the Y-shaped groove, and around the concave groove. A plurality of horizontally long peripheral embosses are formed in the absorbent body located at intervals in the longitudinal direction of the absorbent article, and an absorbent body defect portion is formed between the Y-shaped groove and the concave groove and between the concave grooves. The absorbent article according to any one of claims 1 to 5.